<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>条件渲染</title>
</head>
<style>
    .new {
        background-color: aqua;
    }
</style>
<script src="./js/react.development.js"></script>
<script src="./js/react-dom.development.js"></script>
<!-- 引入 babel  将jsx语法 转换为 js语法 -->
<script src="./js/babel.min.js"></script>

<body>
    <div id="root"></div>
</body>
<script type="text/babel">
    let users = false
    let vdom = <div>
        <p className="new"> <span>广告</span></p>

    </div>
    // if(!users){
    //     ReactDOM.render(vdom,document.getElementById("root"))
    // }
    
    // users?null: ReactDOM.render(vdom,document.getElementById("root"))


    users && ReactDOM.render(vdom, document.getElementById("root"))


</script>

</html>